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LABORATORY IV - CNIDARIA AND CTENOPHORA

Read pages 73-91 in Sherman & Sherman


THE LION'S MANE JELLYFISH THE CUBOMEDUSA SEA WASP
THE UPSIDE-DOWN JELLYFISHTHE BROODING ANEMONE
THE ELEGANT SEA ANEMONETHE GREEN SEA ANEMONE
CORYNACTIS CNIDOCYST DISCHARGE

CNIDOCYSTS IN VARIOUS STATES OF DISCHARGE. ACROPORA INDIVIDUAL POLYPS
THE ELEGANT ORANGE CORAL SEA PEN
CARPET ANEMONE AND CLOWN FISH POCILLOPORA POLYPS
BLUE CORAL HEAD PORITES WHICH HAS BEEN GRAZED BY PARROT FISH
CORAL TAXONOMIST
OTHER CORAL REEF OCCUPANTS

ANOTHER CORAL REEF OCCUPANT


MAP OF ENIWETOK ATOLL, MARSHALL ISLANDS HYDROGEN BOMB BLAST AT ENIWETOK ATOLL, 1952

HYDROGEN BOMB BLAST AT ENIWETOK ATOLL, M.I., 1952


ATOLL ISLETS WINDWARD REEF
CORAL PREBLEACHING CORAL POSTBLEACHING

CORAL BLEACHING THROUGH EXPULSION OF
HEAT-STRESSED, SYMBIOTIC ZOOXANTHELLAE.



Living Materials:

Corynactis is a small anemone which possesses the largest cnidocysts within the Cnidaria. Your TA will snip off a small piece of tentacle material which will be placed in 95% ethanol for 3-5 minutes, replaced upon a microscope slide to dry, and then while you have the preparation inview and covered with a slip, you add aquaeous methylene blue dye to the tissue. By so doing, youwill elicit the slow discharge of the cnidocysts.

Various anemones including Anthopleura a green species which contains algal symbionts. Your TA will have a television display showing zooxanthellae from this local cnidarian. Be sure to review the size, appearance, and location of these symbionts Symbiodinium microadiatricum

.

A living preparation of the filter-feeding anemone Metridium is from the same genus as the material that you will be dessecting as a preserved specimen. Observe the fine tentacle structure and how it may be used to filter food from the water. Compare its feeding methods with those of Anthopleura

.

Plankton Tow. Carefully examine the live container of sea water containing various hydromedusae, schyphomedusae and ctenophores taken by plankton net for an area just outside Burrard Inlet. Observe differences in swimming & feeding between these groups.

Prepared Slides: Be sure to take only one microscope preparation at a time from the box on your table. These slides include the following organisms and reproductive stages:

Goninemus, Obelia, Pennaria,Tubularia.

Aurelia ephyra larvae, planula larvae, strobila, and scyphistoma stages.

Metridium cross sections & long sections.

Demonstration Materials: Various dry and wet museum specimens, see posters and models. Zooxanthellae from Anthhopleura on television microscope monitor. Ptilosarcus (large sea pen) - colonial anthozoan.

Exercises: (will vary somewhat depending upon delivery of live materials). You will always have preserved preparations of Metridium for dissection. Follow the instructions and guide to anatomy found in Sherman & Sherman.


THE VENUS GIRDLE CTENOPHORE TWO BEROE INDIVIDUALS
THE SEA GOOSEBERRY SECONDARY TENTACLES OF PLEUROBRACHIA COVERED WITH COLLOBLAST CELLS
ISOLATED COLLOBLAST CELLS ON COPEPOD COLLOBLAST CELLS WITH GLUE RELEASE
STRUCTURE OF COLLOBLAST CELL AND ITS LOCATION ON THE TENTACLES OF PLEUROBRACHIA

Copyright ©1997, 1998, 1999, 2000 & 2001 by Peter Vaughn Fankboner
All photographs copyright ©1997, 1998, 1999, 2000 & 2001 by Peter Vaughn Fankboner
No images or text contained within this site may be reproduced
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written permission of Peter Vaughn Fankboner.

Questions or comments by snail mail
should be addressed to:

DR. PETER V. FANKBONER
DEPARTMENT OF BIOLOGICAL SCIENCES
SIMON FRASER UNIVERSITY
BURNABY, BRITISH COLUMBIA
CANADA V5A 1S6